G3520B LE Gas Petroleum Engine


Features At A Glance

Engine Design
Ultra Lean Burn Technology (ULB)
Advanced Digital Engine Management
Full Range of Attachments
Gas Engine Rating Pro
Product Support Offered Through Global Cat Dealer
Web Site

Product Specifications for G3520J

Engine Specifications

Capacity for Liquids

Governor and Protection

G3520J Standard Equipment

Air Inlet System

  • Axial Flow Air cleaner
  • Single element canister type with service indicator

Cooling System

  • Two-stage charge air cooling: First stage - JW + OC + 1st stage AC / Second stage - 2nd stage AC
  • Jacket water and aftercooler thermostats

Exhaust System

  • Water-cooled exhaust manifolds
  • Dry turbocharger housings
  • Water-cooled exhaust elbow

Flywheels and Flywheel Housings

  • SAE No. 21 flywheel
  • SAE No. 00 flywheel housing
  • SAE standard rotation

Fuel System

  • 7-40 psig gas supply
  • Electronic fuel metering valve
  • Gas pressure regulator
  • Gas shutoff valve


  • Remote-mounted Advisor control panel
  • Product Link cellular radio

Lubrication System

  • Crankcase breather — top mounted
  • Oil cooler
  • Oil filter — RH
  • Oil pan — 143 gal
  • Oil sampling valve
  • Turbo oil accumulator

Mounting System

  • Rails

Power Take-Offs

  • Front housing — two-sided
  • Front lower LH accessory drive


  • Paint — Cat yellow
  • Crankshaft vibration damper and guard

G3520J Optional Equipment

Air Inlet System

  • Round air inlet adaptors
  • Rain shield

Charging System

  • CSA alternator (24V,65A)

Cooling System

  • Jacket water inlet flange-hose connection

Exhaust System

  • Flexible fittings
  • Flanges
  • Elbow

Fuel System

  • Fuel filter


  • LAN adapter
  • 15',40',90',140' Product Link extension harness
  • 20',30',50',100' interconnect harness

Lubrication System

  • Lubricating oil
  • Oil bypass filter
  • Air prelube pump
  • Oil pan drain

Power Take-Offs

  • Front stub shaft
  • Crankshaft pulley

Starting System

  • Air pressure regulator
  • 90 psi starter
  • 150 psi starter
  • Jacket water heater


  • Special paint
  • Crankshaft vibration double damper
  • Explosion relief valves

EU Certification

  • EEC DOI certification

See how G3520J compares against frequently compared products.

Tools And Expert Help At Every Turn

Check out current offers for the G3520J

View More Offers